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COMMERCIAL PARTNERS AND OTHER AGREEMENTS (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jul. 20, 2018 | Dec. 05, 2012 | Aug. 31, 2016 | Jun. 30, 2016 | Apr. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 19, 2018
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation |  |  |  |  |  |  |  | $ 1,600 | $ 5,400 |  |
Inventory Write-down |  |  |  |  |  |  |  |  |  | $ 20,700 |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  |  |  |  |  | (1,564) | (4,868) | 0 |
Supplemental Unemployment Benefits, Severance Benefits |  |  |  |  |  |  |  | 0 | 0 | 0 |
Discontinued Operations - Residual Lease Costs |  |  |  |  |  |  |  | 1,970 | 1,768 | 0 |
Asset Retirement Obligation, Current |  |  |  |  |  |  |  | 282 | 309 | 0 |
Discontinued Operation, Amounts of Material Contingent Liabilities Remaining |  |  |  |  |  |  |  | 2,252 | 2,077 | $ 0 |
Severance Costs |  |  |  |  |  |  |  | 0 | 303 |  |
Discontinued Operations - Remaining Lease Costs |  |  |  |  |  |  |  | 1,513 | 2,018 |  |
Discontinued Operations - Fixed Asset and Inventory Writedown |  |  |  |  |  |  |  | 0 | 2,470 |  |
Costs Incurred, Asset Retirement Obligation Incurred |  |  |  |  |  |  |  | 51 | 656 |  |
Payments for Postemployment Benefits |  |  |  |  |  |  |  | 0 | (303) |  |
Discontinued Operations, Payments For Lease Costs |  |  |  |  |  |  |  | (1,311) | (744) |  |
Asset Retirement Obligation, Liabilities Settled |  |  |  |  |  |  |  | (91) | (420) |  |
Disposal Group, Including Discontinued Operation, Operating Expense |  |  |  |  |  |  |  | (1,402) | (1,467) |  |
Other Adjustments to Income, Discontinued Operations |  |  |  |  |  |  |  | 0 | 494 |  |
Business Exit Costs |  |  |  |  |  |  |  | 13 | 73 |  |
Discontinued Operations Assets removed from Service |  |  |  |  |  |  |  |  | (2,470) |  |
Total Change in Discontinued Operations Balance |  |  |  |  |  |  |  | 13 | 567 |  |
Contract Termination Fee |  |  |  |  |  |  |  | 7,100 |  |  |
Contract Termination Fee, Current Portion |  |  |  |  |  |  |  | 0 | 2,400 |  |
Aratana |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Up-front payment received |  | $ 1,000 |  |  |  |  |  |  |  |  |
Milestone payment received |  |  | $ 1,000 | $ 1,000 |  | $ 500 |  |  |  |  |
Aratana | Maximum | Achievement of development and commercial milestones |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Milestone payments Company is entitled to receive based on terms of agreement |  | $ 40,000 |  |  |  |  |  |  |  |  |
Nuance Biotech Co. Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Up-front payment received | $ 3,000 |  |  |  |  |  |  |  |  |  |
Nuance Biotech Co. Ltd. [Member] | Maximum | Achievement of development and commercial milestones |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Milestone payments Company is entitled to receive based on terms of agreement |  |  |  |  |  |  |  |  |  |  | $ 60,000
Mundipharma Ltd [Member] |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
European Rights Expansion & New Distribution Payment |  |  |  |  | $ 8,000 |  |  |  |  |  |
Term Extension of 2003 Agreements |  |  |  |  | P15Y |  |  |  |  |  |
DepoCyte [Member] |  |  |  |  |  |  |  |  |  |  |
COMMERCIAL PARTNERS AND OTHER AGREEMENTS |  |  |  |  |  |  |  |  |  |  |
Inventory Write-down |  |  |  |  |  |  |  |  | 500 |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  |  |  |  | $ (4,900) | $ 1,564 | $ 5,447 |  |

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